Method of producing clamping-sleeves.



H. D. FORSLUND.

METHOD 0F PRODUCING CLAMPING SLEEVES.

APPLICATION FILED Avez?. 1917.

l @pa Patented Feb. 19, 1918.,

` of the required finally, cut lengthwise to allow the necessaryv mine DANIEL EoEsLUND, or

GTTENBORG, SWEDEN, ASSIGNOR T0 AKTIEBOLAGET SVENSKA KULLAGERFABRIKEN, OF GOTTNBOBG, SWEDEN, A CORPORATION 0F ratentea Een. ie, isis,

SWEDEN.

METHOD OF FRODUCING CLAMPING-SLEEVES.

1,256,612. Specification o/Letters Patent.

Application led August 27, 1917. Serial No, 188,475.

To all whom t may concern:

Be it known that I, HENNING DANIEL FORSLUND, a subject-of the King of Sweden, residing in Gottenborg, Sweden, have invented Va certain new and useful Method of Producing Clamping-.Sleeves,of-which the fol- -lowing is a specification, reference being had to thedrawing accompanying and forming a part thereof.

This invention relates to a method of pro! ducing clamping sleeves andmore particularly clamping sleeves used iny connection with ball and roller bearings and adapted to secure the inner bearing ring to .,Heretofore, vclamping sleeves of this kind have generally been made of pipes which 'are turned attlie inner and at the outer lsi'de, then preferably polished and cut into pieces length, said pieces being,

compression in tightening the bearing.

Such a method is, however, rather expensive owing to the tedious turning, cutting* and polishing'operations`and, besides, to the considerable loss of material caused by the turning operation.

The object of this invention isto preventy the labove mentioned inconveniences and -to -aiford a simple, cheap and accurate produc' tion of clamping sleeves of the aforesaid kind. i

To attain this object vthe clamping sleeve, according to this invention',` is made of a preferably cold-drawn plate'of steel or other suitable material vby pressing operations,

thus saving time and preventing loss of ma- A terial.

In the drawing,Figure` v1 shows the sleeve blank viewed from the side. Fig. 2 is a crosssection of said blank. Fig. 3 is a sectional view showing the sleeve blank after the first pressing operation. Fig. 4 is a similar /view showing the sleeve blank after the second pressing operation. Fig. 5 is a side-view of the sleeve during the so-called precision pressing operation. Fig. 6 shows the linished clamping sleeve viewed from one end.

Referring first to Fig. l, the Sleeve blank preferably consists of a rectangular plate the cross-section of which is formed, for the one part, of a trapezium and, for the of a rectangle, as shown in Fig. 2, the plate e narrowing from the upper side, for instance the shaft. f

' responds, pre

other part, l

section is, preferably, rectilinear. This form of section is chosen with a view of giving the outer side of the finished sleeve a partly conical and ,f partly cylindrical form, the cylindrical portion of the sleeve being adapted to'be provided, in a wellknown manner, with threads for the clamping nut.

The plate 1 is placed with the broken side downward on the press form 2, Fig. 3, and is then bentinto U-form, as shown `in said figure, by means of the presstool 3. The lower surface of the press tool 3 is, preferably, vcylindrical throughout, whereas the corresponding surface of the form or block -2 is preferably partly conical and partly cylindrical, corresponding to the desired form of the sleeve. The sleeve blank 1, having been benttin this manner, is then placed on a cylindricalv mandrel 4, Fig. 4, and inserted together-withv said mandrel into a press-form or block 2 having face corresponding to lthe surface of the Fig. 3. .The upright Shanks of vthe sleeve blank are then pressed, by means of jaws y 5 and 6 movablein a direction toward and away from each other, against the c lin- 'y d rical mandrel 4, thus giving the s eeve blank the form shown in Fig. 4. vThe form of the inner surfaces of the jaws 5`and 6 corworking surface of the block 2..

.The pressing operations above described may also be effected in. continuous succession without the necessity of removing the sleeve blank from the press machine, 'if the upper portion of the form or'block 2 having plane sides, Fig. 3, be replaced by the jaws 5 and Fig. 4. ln this case the sleeve blank is placed in the manner above 'described on the separated jaws and, by means of the press tool 3, obtains the form shown in Fig. 3. Then tlie'press tool is removed and replaced by the mandiel 4, whereupon thejaws 5 and 6 are moved against each other in the man-l ner shown in Fig. 4.

Finally, the sleeve blank thus prepared is placed on the cylindrical lower portion of a press to'ol 7, Fig.'5 and is pressed, by means of this tool, into the form or block-'8, the

form of'which corresponds accurately to the lower portion lof the block 2 shown in j 85 ferably, to the form ofv the the Working surface of the block 8 Will effect a polishing action on the outer surface of the sleeve, thus rendering the customaryvpolishing operation unnecessary.

rlhe finished clamping sleeve shown in Fig. 6 has'an inner cylindrical surface, the outer surface ,being partly cylindrical and partly conical.

As hereinbefore mentioned, the cylindrical portion of the sleeve, for instance up to the point a, Fig. 5, is finally provided With threads in a Wellknown manner.

I claim as my invention The method of producing clamping sleeves,

especially for ball andlrsr bearings, which consists in producing a preferably rectangular plate having a cross-sectionwhiihI is partly Wedge-shaped and partly of edu-al Width, pressing said plate to a sleeve having\\ interiorly `a cylindrical form and having eX- 20 teriorly a partly cylindrical and partly conical form and provided With a slit which allows a yielding compression of the sleeve, and thereupon threading the outer side of the cylindrical portion of the sleeve. l

In testimony whereof I have signed my name.

HENNING DANIEL FORSLUND. 

